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Optical waveguide writing with a diode-pumped femtosecond oscillator

Optical waveguide writing with a diode-pumped femtosecond oscillator,10.1364/OL.29.001900,Optics Letters,Roberto Osellame,Nicola Chiodo,Giuseppe della

Optical waveguide writing with a diode-pumped femtosecond oscillator   (Citations: 15)
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Optical waveguide writing is demonstrated by means of a diode-pumped cavity-dumped Yb:glass femtosecond laser oscillator with a pulse energy of 270 nJ at a 166-kHz repetition rate. Waveguides realized on an Er:Yb-doped phosphate glass are almost perfectly mode matched to standard single-mode fibers at 1.55 µm and show a 1.2-dB net gain in a standard telecommunications amplifier setup. Waveguide writing with a compact femtosecond laser oscillator is an important step toward introducing this technique into an industrial context.
Journal: Optics Letters , vol. 29, no. 16, pp. 1900-1902, 2004
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    • ...Recent advances in amplified high repetition rate ( 1 MHz) femtosecond lasers have enabled much faster waveguide fabrication times ( 1 cm/s) with properties of low birefringence and sufficient index contrast that now extend to telecom wavelengths to provide low 0.2-dB/cm propagation loss [4], [5], [9]...

    S. M. Eatonet al. Telecom-Band Directional Coupler Written With Femtosecond Fiber Laser

    • ...writing with a diode-pumped cavity-dumped Yb:glass femtosecond oscillator has been demonstrated for the first time [27]...
    • ...In particular, using a first version of the present system, with maximum repetition rate of 166 kHz and pulse energy of about 300 nJ, net gain in the telecommunication C-Band using an erbium ytterbium co-doped phosphate glass has been demonstrated [27]...
    • ...In previous work [27], different focusing objectives were tested, and the best results in terms of circular symmetry of the waveguide mode were obtained by a very high numerical aperture (N.A.) objective (100 X oil-immersion Zeiss Plan-Apochromat, 1.4 N.A.)...
    • ...In previous papers [27], [28], we presented the results obtained at 166 kHz with a similar laser system; now, the improvements discussed in Section II allow us to investigate femtosecond laser writing at higher repetition rates...
    • ...From an overlapping integral of the electric fields [27], we estimate the lowest achievable coupling losses and, by subtracting them from the insertion losses, an upper limit for the propagation losses is obtained...
    • ...In a previous work [27], we used a similar laser system with a repetition rate of 166 kHz...

    Roberto Osellameet al. Waveguide lasers in the C-band fabricated by laser inscription with a ...

    • ...Duetothehighfrequency doubling efficiency waveguide writing withthefundamental andalso withthesecond harmonic pulses wasdemonstrated [5, 6]. * Wesuccessfully demonstrated twophoton microscopy, micro surgery, andboneandtooth ablation...

    A. Killiet al. Microjoule femtosecond laser pulses from a cavity dumped Yb:KYW oscill...

    • ...In general, the total losses inside an optical waveguide (Insertion Losses - IL) can be divided in length dependent losses, which follow the Beer's law described in (1) and lenght independent losses, like the coupling losses due to field mismatch between the fiber and the waveguide optical modes [12]...

    A. Pitantiet al. rib waveguides

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